Book excerpt: Forensic science is playing an increasingly important role in criminal investigations, as it provides scientific methods and techniques to gather and analyse evidence from crime scenes. Forensic evidence can be crucial in identifying suspects, linking them to the crime scene, and helping to secure convictions in court. In this sense, forensic science is seen as an aid to criminal investigation, providing reliable and objective evidence that can be used to uncover the truth behind criminal activities. The integration of forensic science with law and criminology is creating a new era of progressive thinking, where advanced techniques are being developed to better understand the nature of crime and the behaviour of criminals. With the help of forensic science, investigators can obtain speedy justice and bring criminals to book. However, this requires appropriate measures to be taken for the efficient execution of forensic investigations, including the use of modern technology and the training of professionals in the latest forensic techniques. Given the importance of forensic science in the criminal justice system, it is essential to have a comprehensive understanding of its different aspects. This includes the collection, preservation, and analysis of forensic evidence, as well as the interpretation of this evidence in the context of criminal investigations. This book covers these topics in detail, providing valuable insights for professionals, practitioners, academics, and students of the related fields.